679 lines
15 KiB
Perl
Executable file
679 lines
15 KiB
Perl
Executable file
#!/usr/bin/env perl
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#
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# ====================================================================
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# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
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# project. The module is, however, dual licensed under OpenSSL and
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# CRYPTOGAMS licenses depending on where you obtain it. For further
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# details see http://www.openssl.org/~appro/cryptogams/.
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# ====================================================================
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#
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# July 2004
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#
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# 2.22x RC4 tune-up:-) It should be noted though that my hand [as in
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# "hand-coded assembler"] doesn't stand for the whole improvement
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# coefficient. It turned out that eliminating RC4_CHAR from config
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# line results in ~40% improvement (yes, even for C implementation).
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# Presumably it has everything to do with AMD cache architecture and
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# RAW or whatever penalties. Once again! The module *requires* config
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# line *without* RC4_CHAR! As for coding "secret," I bet on partial
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# register arithmetics. For example instead of 'inc %r8; and $255,%r8'
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# I simply 'inc %r8b'. Even though optimization manual discourages
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# to operate on partial registers, it turned out to be the best bet.
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# At least for AMD... How IA32E would perform remains to be seen...
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# November 2004
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#
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# As was shown by Marc Bevand reordering of couple of load operations
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# results in even higher performance gain of 3.3x:-) At least on
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# Opteron... For reference, 1x in this case is RC4_CHAR C-code
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# compiled with gcc 3.3.2, which performs at ~54MBps per 1GHz clock.
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# Latter means that if you want to *estimate* what to expect from
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# *your* Opteron, then multiply 54 by 3.3 and clock frequency in GHz.
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# November 2004
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#
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# Intel P4 EM64T core was found to run the AMD64 code really slow...
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# The only way to achieve comparable performance on P4 was to keep
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# RC4_CHAR. Kind of ironic, huh? As it's apparently impossible to
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# compose blended code, which would perform even within 30% marginal
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# on either AMD and Intel platforms, I implement both cases. See
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# rc4_skey.c for further details...
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# April 2005
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#
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# P4 EM64T core appears to be "allergic" to 64-bit inc/dec. Replacing
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# those with add/sub results in 50% performance improvement of folded
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# loop...
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# May 2005
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#
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# As was shown by Zou Nanhai loop unrolling can improve Intel EM64T
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# performance by >30% [unlike P4 32-bit case that is]. But this is
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# provided that loads are reordered even more aggressively! Both code
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# pathes, AMD64 and EM64T, reorder loads in essentially same manner
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# as my IA-64 implementation. On Opteron this resulted in modest 5%
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# improvement [I had to test it], while final Intel P4 performance
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# achieves respectful 432MBps on 2.8GHz processor now. For reference.
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# If executed on Xeon, current RC4_CHAR code-path is 2.7x faster than
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# RC4_INT code-path. While if executed on Opteron, it's only 25%
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# slower than the RC4_INT one [meaning that if CPU <20>-arch detection
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# is not implemented, then this final RC4_CHAR code-path should be
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# preferred, as it provides better *all-round* performance].
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# March 2007
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#
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# Intel Core2 was observed to perform poorly on both code paths:-( It
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# apparently suffers from some kind of partial register stall, which
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# occurs in 64-bit mode only [as virtually identical 32-bit loop was
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# observed to outperform 64-bit one by almost 50%]. Adding two movzb to
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# cloop1 boosts its performance by 80%! This loop appears to be optimal
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# fit for Core2 and therefore the code was modified to skip cloop8 on
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# this CPU.
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# May 2010
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#
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# Intel Westmere was observed to perform suboptimally. Adding yet
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# another movzb to cloop1 improved performance by almost 50%! Core2
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# performance is improved too, but nominally...
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# May 2011
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#
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# The only code path that was not modified is P4-specific one. Non-P4
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# Intel code path optimization is heavily based on submission by Maxim
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# Perminov, Maxim Locktyukhin and Jim Guilford of Intel. I've used
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# some of the ideas even in attempt to optmize the original RC4_INT
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# code path... Current performance in cycles per processed byte (less
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# is better) and improvement coefficients relative to previous
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# version of this module are:
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#
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# Opteron 5.3/+0%(*)
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# P4 6.5
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# Core2 6.2/+15%(**)
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# Westmere 4.2/+60%
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# Sandy Bridge 4.2/+120%
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# Atom 9.3/+80%
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# VIA Nano 6.4/+4%
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# Ivy Bridge 4.1/+30%
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# Bulldozer 4.5/+30%(*)
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#
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# (*) But corresponding loop has less instructions, which should have
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# positive effect on upcoming Bulldozer, which has one less ALU.
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# For reference, Intel code runs at 6.8 cpb rate on Opteron.
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# (**) Note that Core2 result is ~15% lower than corresponding result
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# for 32-bit code, meaning that it's possible to improve it,
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# but more than likely at the cost of the others (see rc4-586.pl
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# to get the idea)...
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$flavour = shift;
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$output = shift;
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if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
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$win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
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$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
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( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
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( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
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die "can't locate x86_64-xlate.pl";
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open STDOUT,"| \"$^X\" $xlate $flavour $output";
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$dat="%rdi"; # arg1
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$len="%rsi"; # arg2
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$inp="%rdx"; # arg3
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$out="%rcx"; # arg4
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{
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$code=<<___;
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.text
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.extern OPENSSL_ia32cap_P
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.globl RC4
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.type RC4,\@function,4
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.align 16
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RC4: or $len,$len
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jne .Lentry
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ret
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.Lentry:
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push %rbx
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push %r12
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push %r13
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.Lprologue:
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mov $len,%r11
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mov $inp,%r12
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mov $out,%r13
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___
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my $len="%r11"; # reassign input arguments
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my $inp="%r12";
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my $out="%r13";
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my @XX=("%r10","%rsi");
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my @TX=("%rax","%rbx");
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my $YY="%rcx";
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my $TY="%rdx";
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$code.=<<___;
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xor $XX[0],$XX[0]
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xor $YY,$YY
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lea 8($dat),$dat
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mov -8($dat),$XX[0]#b
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mov -4($dat),$YY#b
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cmpl \$-1,256($dat)
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je .LRC4_CHAR
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mov OPENSSL_ia32cap_P(%rip),%r8d
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xor $TX[1],$TX[1]
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inc $XX[0]#b
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sub $XX[0],$TX[1]
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sub $inp,$out
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movl ($dat,$XX[0],4),$TX[0]#d
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test \$-16,$len
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jz .Lloop1
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bt \$30,%r8d # Intel CPU?
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jc .Lintel
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and \$7,$TX[1]
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lea 1($XX[0]),$XX[1]
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jz .Loop8
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sub $TX[1],$len
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.Loop8_warmup:
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add $TX[0]#b,$YY#b
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movl ($dat,$YY,4),$TY#d
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movl $TX[0]#d,($dat,$YY,4)
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movl $TY#d,($dat,$XX[0],4)
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add $TY#b,$TX[0]#b
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inc $XX[0]#b
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movl ($dat,$TX[0],4),$TY#d
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movl ($dat,$XX[0],4),$TX[0]#d
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xorb ($inp),$TY#b
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movb $TY#b,($out,$inp)
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lea 1($inp),$inp
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dec $TX[1]
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jnz .Loop8_warmup
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lea 1($XX[0]),$XX[1]
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jmp .Loop8
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.align 16
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.Loop8:
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___
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for ($i=0;$i<8;$i++) {
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$code.=<<___ if ($i==7);
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add \$8,$XX[1]#b
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___
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$code.=<<___;
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add $TX[0]#b,$YY#b
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movl ($dat,$YY,4),$TY#d
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movl $TX[0]#d,($dat,$YY,4)
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movl `4*($i==7?-1:$i)`($dat,$XX[1],4),$TX[1]#d
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ror \$8,%r8 # ror is redundant when $i=0
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movl $TY#d,4*$i($dat,$XX[0],4)
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add $TX[0]#b,$TY#b
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movb ($dat,$TY,4),%r8b
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___
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push(@TX,shift(@TX)); #push(@XX,shift(@XX)); # "rotate" registers
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}
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$code.=<<___;
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add \$8,$XX[0]#b
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ror \$8,%r8
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sub \$8,$len
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xor ($inp),%r8
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mov %r8,($out,$inp)
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lea 8($inp),$inp
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test \$-8,$len
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jnz .Loop8
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cmp \$0,$len
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jne .Lloop1
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jmp .Lexit
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.align 16
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.Lintel:
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test \$-32,$len
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jz .Lloop1
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and \$15,$TX[1]
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jz .Loop16_is_hot
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sub $TX[1],$len
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.Loop16_warmup:
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add $TX[0]#b,$YY#b
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movl ($dat,$YY,4),$TY#d
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movl $TX[0]#d,($dat,$YY,4)
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movl $TY#d,($dat,$XX[0],4)
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add $TY#b,$TX[0]#b
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inc $XX[0]#b
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movl ($dat,$TX[0],4),$TY#d
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movl ($dat,$XX[0],4),$TX[0]#d
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xorb ($inp),$TY#b
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movb $TY#b,($out,$inp)
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lea 1($inp),$inp
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dec $TX[1]
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jnz .Loop16_warmup
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mov $YY,$TX[1]
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xor $YY,$YY
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mov $TX[1]#b,$YY#b
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.Loop16_is_hot:
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lea ($dat,$XX[0],4),$XX[1]
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___
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sub RC4_loop {
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my $i=shift;
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my $j=$i<0?0:$i;
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my $xmm="%xmm".($j&1);
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$code.=" add \$16,$XX[0]#b\n" if ($i==15);
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$code.=" movdqu ($inp),%xmm2\n" if ($i==15);
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$code.=" add $TX[0]#b,$YY#b\n" if ($i<=0);
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$code.=" movl ($dat,$YY,4),$TY#d\n";
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$code.=" pxor %xmm0,%xmm2\n" if ($i==0);
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$code.=" psllq \$8,%xmm1\n" if ($i==0);
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$code.=" pxor $xmm,$xmm\n" if ($i<=1);
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$code.=" movl $TX[0]#d,($dat,$YY,4)\n";
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$code.=" add $TY#b,$TX[0]#b\n";
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$code.=" movl `4*($j+1)`($XX[1]),$TX[1]#d\n" if ($i<15);
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$code.=" movz $TX[0]#b,$TX[0]#d\n";
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$code.=" movl $TY#d,4*$j($XX[1])\n";
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$code.=" pxor %xmm1,%xmm2\n" if ($i==0);
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$code.=" lea ($dat,$XX[0],4),$XX[1]\n" if ($i==15);
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$code.=" add $TX[1]#b,$YY#b\n" if ($i<15);
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$code.=" pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n";
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$code.=" movdqu %xmm2,($out,$inp)\n" if ($i==0);
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$code.=" lea 16($inp),$inp\n" if ($i==0);
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$code.=" movl ($XX[1]),$TX[1]#d\n" if ($i==15);
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}
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RC4_loop(-1);
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$code.=<<___;
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jmp .Loop16_enter
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.align 16
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.Loop16:
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___
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for ($i=0;$i<16;$i++) {
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$code.=".Loop16_enter:\n" if ($i==1);
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RC4_loop($i);
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push(@TX,shift(@TX)); # "rotate" registers
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}
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$code.=<<___;
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mov $YY,$TX[1]
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xor $YY,$YY # keyword to partial register
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sub \$16,$len
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mov $TX[1]#b,$YY#b
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test \$-16,$len
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jnz .Loop16
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psllq \$8,%xmm1
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pxor %xmm0,%xmm2
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pxor %xmm1,%xmm2
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movdqu %xmm2,($out,$inp)
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lea 16($inp),$inp
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cmp \$0,$len
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jne .Lloop1
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jmp .Lexit
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.align 16
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.Lloop1:
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add $TX[0]#b,$YY#b
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movl ($dat,$YY,4),$TY#d
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movl $TX[0]#d,($dat,$YY,4)
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movl $TY#d,($dat,$XX[0],4)
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add $TY#b,$TX[0]#b
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inc $XX[0]#b
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movl ($dat,$TX[0],4),$TY#d
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movl ($dat,$XX[0],4),$TX[0]#d
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xorb ($inp),$TY#b
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movb $TY#b,($out,$inp)
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lea 1($inp),$inp
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dec $len
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jnz .Lloop1
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jmp .Lexit
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.align 16
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.LRC4_CHAR:
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add \$1,$XX[0]#b
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movzb ($dat,$XX[0]),$TX[0]#d
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test \$-8,$len
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jz .Lcloop1
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jmp .Lcloop8
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.align 16
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.Lcloop8:
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mov ($inp),%r8d
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mov 4($inp),%r9d
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___
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# unroll 2x4-wise, because 64-bit rotates kill Intel P4...
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for ($i=0;$i<4;$i++) {
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$code.=<<___;
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add $TX[0]#b,$YY#b
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lea 1($XX[0]),$XX[1]
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movzb ($dat,$YY),$TY#d
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movzb $XX[1]#b,$XX[1]#d
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movzb ($dat,$XX[1]),$TX[1]#d
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movb $TX[0]#b,($dat,$YY)
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cmp $XX[1],$YY
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movb $TY#b,($dat,$XX[0])
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jne .Lcmov$i # Intel cmov is sloooow...
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mov $TX[0],$TX[1]
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.Lcmov$i:
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add $TX[0]#b,$TY#b
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xor ($dat,$TY),%r8b
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ror \$8,%r8d
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___
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push(@TX,shift(@TX)); push(@XX,shift(@XX)); # "rotate" registers
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}
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for ($i=4;$i<8;$i++) {
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$code.=<<___;
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add $TX[0]#b,$YY#b
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lea 1($XX[0]),$XX[1]
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movzb ($dat,$YY),$TY#d
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movzb $XX[1]#b,$XX[1]#d
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movzb ($dat,$XX[1]),$TX[1]#d
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movb $TX[0]#b,($dat,$YY)
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cmp $XX[1],$YY
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movb $TY#b,($dat,$XX[0])
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jne .Lcmov$i # Intel cmov is sloooow...
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mov $TX[0],$TX[1]
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.Lcmov$i:
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add $TX[0]#b,$TY#b
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xor ($dat,$TY),%r9b
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ror \$8,%r9d
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___
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push(@TX,shift(@TX)); push(@XX,shift(@XX)); # "rotate" registers
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}
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$code.=<<___;
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lea -8($len),$len
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mov %r8d,($out)
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lea 8($inp),$inp
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mov %r9d,4($out)
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lea 8($out),$out
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test \$-8,$len
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jnz .Lcloop8
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cmp \$0,$len
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jne .Lcloop1
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jmp .Lexit
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___
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$code.=<<___;
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.align 16
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.Lcloop1:
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add $TX[0]#b,$YY#b
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movzb $YY#b,$YY#d
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movzb ($dat,$YY),$TY#d
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movb $TX[0]#b,($dat,$YY)
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movb $TY#b,($dat,$XX[0])
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add $TX[0]#b,$TY#b
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add \$1,$XX[0]#b
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movzb $TY#b,$TY#d
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movzb $XX[0]#b,$XX[0]#d
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movzb ($dat,$TY),$TY#d
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movzb ($dat,$XX[0]),$TX[0]#d
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xorb ($inp),$TY#b
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lea 1($inp),$inp
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movb $TY#b,($out)
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lea 1($out),$out
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sub \$1,$len
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jnz .Lcloop1
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jmp .Lexit
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.align 16
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.Lexit:
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sub \$1,$XX[0]#b
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movl $XX[0]#d,-8($dat)
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movl $YY#d,-4($dat)
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mov (%rsp),%r13
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mov 8(%rsp),%r12
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mov 16(%rsp),%rbx
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add \$24,%rsp
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.Lepilogue:
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ret
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.size RC4,.-RC4
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___
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}
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$idx="%r8";
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$ido="%r9";
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$code.=<<___;
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.globl RC4_set_key
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.type RC4_set_key,\@function,3
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.align 16
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RC4_set_key:
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lea 8($dat),$dat
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lea ($inp,$len),$inp
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neg $len
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mov $len,%rcx
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xor %eax,%eax
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xor $ido,$ido
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xor %r10,%r10
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xor %r11,%r11
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mov OPENSSL_ia32cap_P(%rip),$idx#d
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bt \$20,$idx#d # RC4_CHAR?
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jc .Lc1stloop
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jmp .Lw1stloop
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.align 16
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.Lw1stloop:
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mov %eax,($dat,%rax,4)
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add \$1,%al
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jnc .Lw1stloop
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xor $ido,$ido
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xor $idx,$idx
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.align 16
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.Lw2ndloop:
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mov ($dat,$ido,4),%r10d
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add ($inp,$len,1),$idx#b
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add %r10b,$idx#b
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add \$1,$len
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mov ($dat,$idx,4),%r11d
|
||
cmovz %rcx,$len
|
||
mov %r10d,($dat,$idx,4)
|
||
mov %r11d,($dat,$ido,4)
|
||
add \$1,$ido#b
|
||
jnc .Lw2ndloop
|
||
jmp .Lexit_key
|
||
|
||
.align 16
|
||
.Lc1stloop:
|
||
mov %al,($dat,%rax)
|
||
add \$1,%al
|
||
jnc .Lc1stloop
|
||
|
||
xor $ido,$ido
|
||
xor $idx,$idx
|
||
.align 16
|
||
.Lc2ndloop:
|
||
mov ($dat,$ido),%r10b
|
||
add ($inp,$len),$idx#b
|
||
add %r10b,$idx#b
|
||
add \$1,$len
|
||
mov ($dat,$idx),%r11b
|
||
jnz .Lcnowrap
|
||
mov %rcx,$len
|
||
.Lcnowrap:
|
||
mov %r10b,($dat,$idx)
|
||
mov %r11b,($dat,$ido)
|
||
add \$1,$ido#b
|
||
jnc .Lc2ndloop
|
||
movl \$-1,256($dat)
|
||
|
||
.align 16
|
||
.Lexit_key:
|
||
xor %eax,%eax
|
||
mov %eax,-8($dat)
|
||
mov %eax,-4($dat)
|
||
ret
|
||
.size RC4_set_key,.-RC4_set_key
|
||
|
||
.globl RC4_options
|
||
.type RC4_options,\@abi-omnipotent
|
||
.align 16
|
||
RC4_options:
|
||
lea .Lopts(%rip),%rax
|
||
mov OPENSSL_ia32cap_P(%rip),%edx
|
||
bt \$20,%edx
|
||
jc .L8xchar
|
||
bt \$30,%edx
|
||
jnc .Ldone
|
||
add \$25,%rax
|
||
ret
|
||
.L8xchar:
|
||
add \$12,%rax
|
||
.Ldone:
|
||
ret
|
||
.align 64
|
||
.Lopts:
|
||
.asciz "rc4(8x,int)"
|
||
.asciz "rc4(8x,char)"
|
||
.asciz "rc4(16x,int)"
|
||
.asciz "RC4 for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
|
||
.align 64
|
||
.size RC4_options,.-RC4_options
|
||
___
|
||
|
||
# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
|
||
# CONTEXT *context,DISPATCHER_CONTEXT *disp)
|
||
if ($win64) {
|
||
$rec="%rcx";
|
||
$frame="%rdx";
|
||
$context="%r8";
|
||
$disp="%r9";
|
||
|
||
$code.=<<___;
|
||
.extern __imp_RtlVirtualUnwind
|
||
.type stream_se_handler,\@abi-omnipotent
|
||
.align 16
|
||
stream_se_handler:
|
||
push %rsi
|
||
push %rdi
|
||
push %rbx
|
||
push %rbp
|
||
push %r12
|
||
push %r13
|
||
push %r14
|
||
push %r15
|
||
pushfq
|
||
sub \$64,%rsp
|
||
|
||
mov 120($context),%rax # pull context->Rax
|
||
mov 248($context),%rbx # pull context->Rip
|
||
|
||
lea .Lprologue(%rip),%r10
|
||
cmp %r10,%rbx # context->Rip<prologue label
|
||
jb .Lin_prologue
|
||
|
||
mov 152($context),%rax # pull context->Rsp
|
||
|
||
lea .Lepilogue(%rip),%r10
|
||
cmp %r10,%rbx # context->Rip>=epilogue label
|
||
jae .Lin_prologue
|
||
|
||
lea 24(%rax),%rax
|
||
|
||
mov -8(%rax),%rbx
|
||
mov -16(%rax),%r12
|
||
mov -24(%rax),%r13
|
||
mov %rbx,144($context) # restore context->Rbx
|
||
mov %r12,216($context) # restore context->R12
|
||
mov %r13,224($context) # restore context->R13
|
||
|
||
.Lin_prologue:
|
||
mov 8(%rax),%rdi
|
||
mov 16(%rax),%rsi
|
||
mov %rax,152($context) # restore context->Rsp
|
||
mov %rsi,168($context) # restore context->Rsi
|
||
mov %rdi,176($context) # restore context->Rdi
|
||
|
||
jmp .Lcommon_seh_exit
|
||
.size stream_se_handler,.-stream_se_handler
|
||
|
||
.type key_se_handler,\@abi-omnipotent
|
||
.align 16
|
||
key_se_handler:
|
||
push %rsi
|
||
push %rdi
|
||
push %rbx
|
||
push %rbp
|
||
push %r12
|
||
push %r13
|
||
push %r14
|
||
push %r15
|
||
pushfq
|
||
sub \$64,%rsp
|
||
|
||
mov 152($context),%rax # pull context->Rsp
|
||
mov 8(%rax),%rdi
|
||
mov 16(%rax),%rsi
|
||
mov %rsi,168($context) # restore context->Rsi
|
||
mov %rdi,176($context) # restore context->Rdi
|
||
|
||
.Lcommon_seh_exit:
|
||
|
||
mov 40($disp),%rdi # disp->ContextRecord
|
||
mov $context,%rsi # context
|
||
mov \$154,%ecx # sizeof(CONTEXT)
|
||
.long 0xa548f3fc # cld; rep movsq
|
||
|
||
mov $disp,%rsi
|
||
xor %rcx,%rcx # arg1, UNW_FLAG_NHANDLER
|
||
mov 8(%rsi),%rdx # arg2, disp->ImageBase
|
||
mov 0(%rsi),%r8 # arg3, disp->ControlPc
|
||
mov 16(%rsi),%r9 # arg4, disp->FunctionEntry
|
||
mov 40(%rsi),%r10 # disp->ContextRecord
|
||
lea 56(%rsi),%r11 # &disp->HandlerData
|
||
lea 24(%rsi),%r12 # &disp->EstablisherFrame
|
||
mov %r10,32(%rsp) # arg5
|
||
mov %r11,40(%rsp) # arg6
|
||
mov %r12,48(%rsp) # arg7
|
||
mov %rcx,56(%rsp) # arg8, (NULL)
|
||
call *__imp_RtlVirtualUnwind(%rip)
|
||
|
||
mov \$1,%eax # ExceptionContinueSearch
|
||
add \$64,%rsp
|
||
popfq
|
||
pop %r15
|
||
pop %r14
|
||
pop %r13
|
||
pop %r12
|
||
pop %rbp
|
||
pop %rbx
|
||
pop %rdi
|
||
pop %rsi
|
||
ret
|
||
.size key_se_handler,.-key_se_handler
|
||
|
||
.section .pdata
|
||
.align 4
|
||
.rva .LSEH_begin_RC4
|
||
.rva .LSEH_end_RC4
|
||
.rva .LSEH_info_RC4
|
||
|
||
.rva .LSEH_begin_RC4_set_key
|
||
.rva .LSEH_end_RC4_set_key
|
||
.rva .LSEH_info_RC4_set_key
|
||
|
||
.section .xdata
|
||
.align 8
|
||
.LSEH_info_RC4:
|
||
.byte 9,0,0,0
|
||
.rva stream_se_handler
|
||
.LSEH_info_RC4_set_key:
|
||
.byte 9,0,0,0
|
||
.rva key_se_handler
|
||
___
|
||
}
|
||
|
||
sub reg_part {
|
||
my ($reg,$conv)=@_;
|
||
if ($reg =~ /%r[0-9]+/) { $reg .= $conv; }
|
||
elsif ($conv eq "b") { $reg =~ s/%[er]([^x]+)x?/%$1l/; }
|
||
elsif ($conv eq "w") { $reg =~ s/%[er](.+)/%$1/; }
|
||
elsif ($conv eq "d") { $reg =~ s/%[er](.+)/%e$1/; }
|
||
return $reg;
|
||
}
|
||
|
||
$code =~ s/(%[a-z0-9]+)#([bwd])/reg_part($1,$2)/gem;
|
||
$code =~ s/\`([^\`]*)\`/eval $1/gem;
|
||
|
||
print $code;
|
||
|
||
close STDOUT;
|